Hello everybody, it's me rayboy (the one who asked the question)
I dont post until I burned 50 Prodics DVD-R 4X, DVD code: ProdiscS03 , on Sony 500U dual format +/-R/WR, 4X speed, firmware: the original came with the unit (never upgrade f/w).
All DVD burned at 4X speed (15 minutes per DVD). I used DVDShrink and DVD Decrypter for reading (ISO files) and burning

I have [bold]none[/bold] failure. I re-check every DVD after burned and they played OK.